Privacy Policy

Last Updated: 20 March 2026

Welcome to Proof Chain. We are committed to protecting your privacy while providing a secure loyalty experience. This Privacy Policy explains how we handle information across our iOS application and our website (https://proofapp.site).

1. Our "Privacy by Design" Philosophy

Unlike traditional loyalty programs, Proof Chain is built on the principle of data minimisation.

  • For Customers: We do not require accounts, email addresses, or phone numbers. Your visit data is stored locally on your device.
  • For Business Owners: We only collect the minimum information necessary to manage your business profile and subscription.

2. Information We Collect

A. Customer Data (App Users)

  • Locally Stored Data: All records of your visits, timestamps, and business interactions are stored exclusively in your iPhone's local storage. We do not have access to this data.
  • Device Identifier: A unique, secure key is generated on your iPhone to verify your visits. This key is stored securely on your device and is never sent to us. To learn more about how Apple protects this information, visit Apple's security documentation.
  • Customer Alias: If you choose to create an alias (e.g., "Coffee Lover"), this is stored locally and is not linked to your real identity.

B. Business Owner Data

To provide business management services, we collect:

  • Account Information: Email address and login details provided through secure authentication services.
  • Business Details: Name, location, and customisation preferences for your business profile.
  • Subscription Data: Transaction history and subscription status. We do not see or store your credit card details.

C. Staff Data

  • Access Tokens: Staff access is granted via temporary tokens. No personal staff accounts or identities are required or tracked.

D. Website Visitors

Our website (https://proofapp.site) may collect standard web server logs (IP addresses, browser types) for security and performance monitoring.

3. How We Use Your Information

  • To Provide the Service: Using secure verification to confirm your visits.
  • Analytics (Business Owners Only): Aggregating visit data so owners can understand customer patterns without identifying individual customers.
  • Subscription Management: Processing Pro tier features and renewals through Apple's secure infrastructure.

4. Data Storage and Security

  • Customer Data: Your data is encrypted and stored securely on your device using Apple's security features. Because this data never leaves your device, we cannot recover it if you lose your device unless you have enabled cloud sync.
  • Business Data: Business configurations and analytics are stored securely on our servers with encryption.
  • Encryption: All visit records use advanced security codes to prevent unauthorised changes.

5. Data Sharing and Third Parties

We do not sell, rent, or trade your personal data. We use a limited number of trusted service providers:

  • Secure Cloud Services: For business owner authentication and data storage.
  • Apple: For processing all in-app purchases and subscriptions.
  • RevenueCat: For subscription management and entitlement tracking. RevenueCat receives anonymised purchase receipts to determine subscription status. See RevenueCat's Privacy Policy for details.

6. Subscriptions and Auto-Renewal

Proof Chain Pro is offered as an auto-renewable subscription managed entirely through Apple's App Store. By subscribing, you agree to the following terms:

  • Subscription Options: Proof Chain Pro is available as a monthly or annual subscription. The subscription title, duration, and price are displayed in the app prior to purchase.
  • Automatic Renewal: Your subscription automatically renews at the end of each billing period (monthly or annually) unless cancelled at least 24 hours before the renewal date. Your Apple ID will be charged upon confirmation of purchase and at the start of each renewal period.
  • No Access to Payment Details: All billing is handled by Apple. We never see or store your credit card or payment information.
  • Cancellation: You may cancel your subscription at any time via your iPhone Settings → Apple ID → Subscriptions → Proof Chain. Cancellation takes effect at the end of the current billing period; you retain access to Pro features until then.
  • Price Changes: If the subscription price changes, we will notify you in advance. Continued use after the price change takes effect constitutes acceptance of the new price.
  • Refunds: Refund requests are handled by Apple in accordance with their App Store Terms of Service. We do not process refunds directly.
  • Subscription Data We Retain: We retain your subscription status and entitlement history to correctly enable or disable Pro features. This data is associated with your business account and is deleted when you delete your account.

7. Your Rights and Control

  • Customers: You have total control over your data. You may delete your visit history or the entire app at any time, which permanently removes all locally stored data. You may also export your data as CSV or JSON.
  • Business Owners: You may update your business information or delete your account through the app settings. Deleting your account removes all associated business data from our servers.
  • UK/EU Residents (GDPR): As Proof Chain collects minimal personal data and stores customer data locally, we comply with "data protection by design and default" requirements. You may contact us at hi@proofapp.site to exercise your rights of access, rectification, or erasure.

8. Children's Privacy

Proof Chain does not knowingly collect personal information from children. Since customers do not create accounts, we do not track age; however, we encourage parents to monitor their children's mobile usage.

9. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify business owners of significant changes via the app or email. Customers are encouraged to review the policy within the app's settings.

10. Contact Us

If you have any questions regarding this Privacy Policy or our privacy practices, please contact us at: